Pendulum Wall Clock Battery Operated

My unit arrived in good packaging. However there were several issues with the unit.1.) The clock mechanism was loose on the rear of the clock face, and nearly impossible to keep vertical during assembly.2.) Unlocking the mechanism arm to the pendulum took a lot of force, which is essential for installing the batteries.3.) During the battery installation, the mechanism kept misaligning from vertical.4.) After about 10 swings, the pendulum stops moving. Whether from the loose mechanism or other is beyond me.I returned mine for another clock at a higher price point. But unless the manufacturer tightens their assembly, steer clear of this one.